Summary
On November 1960 a special solar activity occured, producing characteristic disturbances in the ionosphere. Athens center followed this activity by vertical sounding and by Riometer recordings. They are evidences for proton events producing deep absorption in the ionosphere and aurora extending till 38° latitude. Some observations concerning July 1961 solar activity are reported. World wide decrease of the maximum electron density reported during the November period was observed also in Athens. Ionospheric disturbances following vertical sounding observations are of «negative» type.
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Anastassiades, M., Ilias, D. & Tsagakis, E. On ionospheric disturbances caused by the solar activity of November 1960. Geofisica Pura e Applicata 51, 142–146 (1962). https://doi.org/10.1007/BF01992655
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DOI: https://doi.org/10.1007/BF01992655